（1）He wants to be a scientist by his endeavor.
（2）Please research the medicine carefully.
（3）Yesterday i sent some photos to my parents.
（4）At the begining of this semester,i found that math is very difficult.1.雖然下雨，但他們繼續(xù)在工作2.他們將怎樣實(shí)現(xiàn)夢想3.我喜歡歷史，但語文不適合我4.下周我能來看你5.他的你能否做此事表示懷疑Though it rains,they continue to work.How they will achieve their dream?I like history,but Chinese is not suitable for me.I can visit you next week.第五題真心看不懂你要表達(dá)什么意思啊，是不是打錯字了??？

1. 媽媽許諾給我買鋼琴

2. 人們很難堅持到底

3. 這個題太難而無法面對回答

My mon promises that buy an piano for me.It is difficult for people to stick out.The problem is too difficult to answer.